<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
    div{
        width:100px;
        height: 100px;
        background:skyblue;
        transition: all 1s;
    }
    div:hover{
        /*  
        skewX(10deg)--水平方向倾斜
        skewY（10deg）--垂直方向倾斜
        skew（x，y）
        */
        transform: skewX(30deg)
    }
    </style>
</head>
<body>
    <div></div>
</body>
</html>